STATE OF ILLlNOlS

نویسندگان

  • DWIGHT H. GREEN
  • M. KOSANKE
چکیده

An intensive study of fossil microspores, isospores, and prepollens isolated from Illinois coal beds has proved that numerous genera and speiies are present The corFelatinn of coal beds is pussible hecause the geological range of many genera and specin is proved, by this investigation, to Le quite restricted. Preliminnrv exwrimentp with ~ w d c interrexional correlations have dernunstratcd a wide lateral distribution of plant kicrofossils nece&ary for the cirrelations of this type.

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تاریخ انتشار 2004